The arctic breeze sixpack cooling unit comes with 6 spray water protected fans (IP 55). Silent long life fans, with ball bearing and a brush free, 12V low voltage motor with an adjustable transformer (3-12V) for speed control. The high capacity fans are adjustable from 80,000 l/h (double unit at 12V) to 240,000 l/h (6 fold unit at 12V). Power consumption is only 0.5 – 3W per fan. The arctic breeze aquarium fans can easily be mounted to the aquarium frame. It cools down the water by increasing evaporation. The housing is made from corrosion proof plastic and aluminium.